Mentions:
One study(13) did not report relevant data with respect to the primary outcome of palliation of cough; thus, four studies were included in the analysis of palliation of cough. After pooling of data, no significant heterogeneity among the studies was found (Q = 4.30, df = 3, P = 0.230; I2 = 30.30%); therefore, a fixed-effects model was used for the analysis. The combined OR revealed no significant difference in palliation of cough between patients treated with a higher RT dose compared to those treated with a lower RT dose. Among the four studies, ORs ranged from 0.69 to 1.33, with the combined OR = 0.88 (95% CI = 0.71–1.08, P = 0.217, Fig. 2a).

Mentions:
One study(13) did not report relevant data with respect to the primary outcome of palliation of cough; thus, four studies were included in the analysis of palliation of cough. After pooling of data, no significant heterogeneity among the studies was found (Q = 4.30, df = 3, P = 0.230; I2 = 30.30%); therefore, a fixed-effects model was used for the analysis. The combined OR revealed no significant difference in palliation of cough between patients treated with a higher RT dose compared to those treated with a lower RT dose. Among the four studies, ORs ranged from 0.69 to 1.33, with the combined OR = 0.88 (95% CI = 0.71–1.08, P = 0.217, Fig. 2a).